Death Stranding Half-Life and Portal crossover debuted with the 2020 PC release, and later arrived on consoles with the Director's Cut edition.
Hidden in the game are bonus missions themed around finding companion cubes.
Completing these rewards you with some Valve themed items - including Gordon Freeman's glasses, a wearable Headcrab from Half-Life, and a Valve, er, valve.
On this page:
If you're looking for assistance on the critical path, our Death Stranding walkthrough can help.
Death Stranding Half-Life and Portal crossover quests explained
Death Stranding's Half-Life and Portal crossover content comes in the form of bonus missions sent to your inbox throughout the game.
Keep checking your inbox, and look for messages with the iconic Half-Life Lambda symbol (λ) in the subject header. For example, the first is from Benjamin H.
Each one wants you to find one of Portal's companion cubes out in the world. The body of the email will give you directions of where to find them based on local settlements and landmarks.
Once you have found the cube, add it to your cargo stack, and return it to a base as you would any other lost cargo, completing the mission and giving you a Valve-themed reward.
There are multiple to find throughout the game - so keep checking your inbox for when new ones appear as you complete more Orders.
Tomorrow is in our hands - again! Learn about the Director's Cut's new features, including new story missions, a racing mode, Half-Life missions and how to transfer saves to PS5. Our main Death Stranding walkthrough outlines how to play through the story, including Episode 3 missions, the Small Thermonuclear Device and how to find a way to change Lockne's mind As you play, you can find Memory Chip locations, learn how Death Stranding multiplayer works.
Death Stranding Half-Life and Portal crossover reward items
For every Half-Life and Portal quest you complete, you unlock a new Valve-themed reward.
From what we know before launch, these include...
Gordon Freeman Glasses:
Wearable Valve valve:
Wearable Half-Life Headcrab:
Half-Life logo decal (for decorating vehicles):
Half-Life Combine Strider hologram (for decorating bases):
Half-Life: Alyx gravity gloves:
If you're looking for more from the critical path, our Death Stranding walkthrough can help.
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